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Title: Amplitude analysis and the nature of the Z c(3900)

The microscopic nature of the XYZ states remains an unsettled topic. We show how a thorough amplitude analysis of the data can help constraining models of these states. Specifically, we consider the case of the Z c(3900) peak and discuss possible scenarios of a QCD state, virtual state, or a kinematical enhancement. Here, we conclude that current data are not precise enough to distinguish between these hypotheses, however, the method we propose, when applied to the forthcoming high-statistics measurements should shed light on the nature of these exotic enhancements.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Univ. Nacional Autonoma de Mexico, Ciudad de Mexico (Mexico)
  3. Indiana Univ., Bloomington, IN (United States)
  4. Univ. Bonn, Bonn (Germany)
  5. Ghent Univ., Ghent (Belgium)
  6. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Indiana Univ., Bloomington, IN (United States)
Publication Date:
Report Number(s):
JLAB-THY-16-2410; DOE/OR/23177-4037; arXiv:1612.06490
Journal ID: ISSN 0370-2693; PII: S0370269317305063
Grant/Contract Number:
AC05-06OR23177; FG02-87ER40365; PHY-1415459; PHY-1205019; IA101717; 251817; FG0287ER40365
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 772; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1365418
Alternate Identifier(s):
OSTI ID: 1391844

Pilloni, A., Fernandez-Ramirez, C., Jackura, A., Mathieu, V., Mikhasenko, M., Nys, J., and Szczepaniak, A. P.. Amplitude analysis and the nature of the Zc(3900). United States: N. p., Web. doi:10.1016/j.physletb.2017.06.030.
Pilloni, A., Fernandez-Ramirez, C., Jackura, A., Mathieu, V., Mikhasenko, M., Nys, J., & Szczepaniak, A. P.. Amplitude analysis and the nature of the Zc(3900). United States. doi:10.1016/j.physletb.2017.06.030.
Pilloni, A., Fernandez-Ramirez, C., Jackura, A., Mathieu, V., Mikhasenko, M., Nys, J., and Szczepaniak, A. P.. 2017. "Amplitude analysis and the nature of the Zc(3900)". United States. doi:10.1016/j.physletb.2017.06.030.
@article{osti_1365418,
title = {Amplitude analysis and the nature of the Zc(3900)},
author = {Pilloni, A. and Fernandez-Ramirez, C. and Jackura, A. and Mathieu, V. and Mikhasenko, M. and Nys, J. and Szczepaniak, A. P.},
abstractNote = {The microscopic nature of the XYZ states remains an unsettled topic. We show how a thorough amplitude analysis of the data can help constraining models of these states. Specifically, we consider the case of the Zc(3900) peak and discuss possible scenarios of a QCD state, virtual state, or a kinematical enhancement. Here, we conclude that current data are not precise enough to distinguish between these hypotheses, however, the method we propose, when applied to the forthcoming high-statistics measurements should shed light on the nature of these exotic enhancements.},
doi = {10.1016/j.physletb.2017.06.030},
journal = {Physics Letters. Section B},
number = C,
volume = 772,
place = {United States},
year = {2017},
month = {6}
}